2013 I QUESTIONS AND ANSWERS :: part8 : 6 to 10
Following Multiple choice objective type questions and answers will help you as a free online coaching for your TRB SSC CGL written exam preparation for 2017. These are useful study materials collected from previous year question papers. :
6.If x²+y²+z²=20 and x+y+z=6 then the value of x³+y³+z³-3xyz is |
| 64 |
| 70 |
| 72 |
| 76 |
7.The minimum value of (x-2)(x-9) is |
| -11/4 |
| 49/4 |
| 0 |
| -49/4 |
8.If a³-b³-c³=0 then the value of a⁹-b⁹-c⁹-3a³b³c³ is |
| 1 |
| 2 |
| 0 |
| -1 |
9.If xy(x+y)=1 then the value of 1/xy-x-y is |
| 3 |
| -3 |
| 1 |
| -1 |
10.If a+b+c=2s,then (s-a)²+(s-b)²+(s-c)²+s² / a²+b²+c² |
| a²+b²+c² |
| 0 |
| 1 |
| 2 |
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